Filter.



No. 888,781. l

K PATENTED MAY 26, 1908. J. T. H. PAUL.

FILTER.

APPLIUATION FILED nu. 1s. 1908.

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PATENTED MAY 26, .1908.

J. T. H. PAUL.

FILTER.

APPLIOATION FILBDJAN. 1e. 1808.

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UNITED STATES PATENT OFFICE'.

JOHN T. l-I. PAUL, OF CHICAGO, ILLINOIS, `A LSSIOAN'OR 'lO E. GOLDMAN zCOMPANY, INCORPO- RATED, OF CHICAGO, ILLINOIS, A OORPOTION OF ILLINOIS.

FILTER.

Application filed January 16, 1908.

To all whom it may concern:

Be it known that I, JonN T. Il. PAUL, a citizen of the United States,residing at Ohicago, in the county of Cook and State of Illinois, haveinvented a new and useful Improvement in Filters, of which the followingis a specification.

My invention relates particularly to filters for use in filteringliquors, such as beer; and my primary object is to provide a filtercomposed of a plurality of cells, each cell having few parts, and thefilter being of high capacity, well adapted to perform with thoroughnessthe function of filtration, and the filterparts being capable of readycleansing and, the construction being, therefore, sanitary in itsnature.

The invention is illustrated in its preferred embodiment in theaccompanying drawings, in which- Figure 1 represents a broken verticalsectional view of a filter constructed in accordance with my invention;Fig. 2, a broken plan view of a lter pan employed; Fig. 3, a brokensectional view taken as indicated at line 3 of Fig. 2, Fig. 4, a brokensectional view taken as indicated at line 4 of Fig. 2; Fig. 5, a viewpartly in section and partly in elevation of a conduit-section employed;Fig. 6, a broken perspective view of a packingring employed; Fig. 7, asectional view of a pad or disk of filter material and which preferablyis preparatorily formed before insertion in the filter; and Fig. 8, abroken sectional view illustrating a slight modification.

In the construction illustrated, A represents a casing having a dishedbottom A1 and a removable top A2; B, an inner base-plate supported onthe casing bottom A1; and. B1, a series of filter cells located in thecasing and forming with the cylindrical wall of the casing an annularchamber B2.

The casing 'A may be of any approved construction. casing bottom A1 is euipped centrally with an outlet conduit a, and at some distance with aninlet conduit a1. The casing top A2 is shown connected-with an externalfiange at the upper end of the cylindrical body of the casing by boltsa2.

The inner base-plate B comprises a disk b equipped on its lower sidewith strengthening ribs b1 and provided at its center with a hollow hubor conduit-section b2. The conduit-section b2 has a reduced portion b3at its Specification 0f Letters Patent.

In the construction shown, the.

r' S ented May 26, 1908.

seriarno. 411,158. -Q

lower end which fits within the hollow boss ol the casing bottoin A1,and confined between the body of the conduit-section b2 and the adjacentportion of the casing bottom A1 is a gasket or packing b1. Theconduit-section b2 is provided at its upper end with an anniilar groovereceiving a gasket or packing 'l Each cell B1 comprisies a cell-pan bwhose bottom is provided with a central. perforation, a conduit section(i7 extending' through said central perforation and provided externallywith a fiange t which rests upon the upper surface of the bottom ofthepan; a packing-ring b encircling the conduitsection and between whichand the flange t8 the central portion of the pan-bottom is confined apacking-ring 1 connected with the lower outer margin of the pan-bottom;a packing-ring 611 resting upon the upper outer marginal surface of thepan-bottom, and a filter mass, or disk of filtering material 512 whichsubstantially fills the pan. The panbottoni is provided at intervalswith radial corrugations 6111 joined by part circular corrugations Z911,as clearly appears from Figs. 2, 3 and 4i. The pan-bottoni also has afiat marginal portion 615 adjacent to the vertical fiange b1 whichconstitutes the circumferential wall of the pan. The flat mar inalportion Z215 of the bottom is substantia ly in the piane of the upperportions of the corru ations, or, in other words, is raised with reation to the extreme bottom portion of the pan. The pan bottom has acentral perforation?)17 and a marginal flat portion 1118 adj acentthereto. The flat inner marginal portion Z118 is substantially on alevel with the lower portions of the corrugations of the pan-bottom, or,in other words, is depressed eneath the plane of the outer fiat marginalportion 515 of the pan-bottom. The panbottom being corrugated, asdescribed, has grooves on its upper surface which serve in collectingthe filtered liquor and conducting it to the central outlet conduit, andhas channels or grooves on its lower surface which serve in distributingthe unfiltered liquor over the upper surface of the filtering material,or filter pad. As stated, the flange which the corrugations 512 affordon the upper surface of the pan-bottom. The upper' surface of the flange5 affords a shoulder 52, the flange acting as a packing-rii'ig co-actingwith the )aching-ring 5 of the filter cell above. Tl'ie lower end of thelowermost conduit section 57 fits within the upper end of theconduit-section 52, and the Lipper end oil` the loweri'nostcomluit-section 57 receives the lower endof the next surinountingconduitsection, and so on. The pacl'iing-rings 510 are provided at theirupper portions with radial perforations 521 which register with theradial grooves on the lower side of the cell an bottoms. Thepacking-rings 519 on the ower side of the outer margin of each cell panis of the right diameter to fit within the upper portion of the verticalflange of the cell pan beneath, as shown. The disks of filteringmaterial 512 are preferably preparatorily formed in a suitable press.When the filter parts are assembled, the pads or disks 512 are againplaced under compression, the packing rings at the outer and innermargins serving to prevent seepa e of the liquor along the verticalflanges o the cell ans, so that the liquor will be forced vto ii terthrough the filter pads` The corrugations in the bottoms of the cellpans are deep and relatively narrow, so that it is practicable to allowthe pads of filtering material to rest directly upon the corrugations,thereby dispensing with the fiber-retaining screens which are common infilter construction.

lf desired, the fiber-retaining screen 522 rmay be placed upon thecorrugated bottom of the cell pan beneath the filter-pad 512.

Where a pad of good quality and long fiber.

is employed, the fiber-retaining screen 522 is unnecessary, however.

The casing top A2 is equipped centrally on its lower surface with a bossor bearing 523 adapted to bear upon the upper end of the uppermostconduit-section 57, and the boss 52a is surrounded by a packing-ring 524which co-acts with the shoulder 520 of the uppermost conduit-section.The casing top is also equipped near its periphery on its lower sideWith a packing-ring 525 Which is received in the upper portion of theuppermost cell pan. The packing-ring 525 is Vrovided with radialperforations 526 and the ower side of the casing top is provided withlgrooves 527, enabling the liquor to be distributed over the uppersurface of the filter-pad in the uppermost cell.

The manner of assembling the parts of the filter will be readilyunderstood. As stated, the pads or disks 5 12 are preferablyreparatorily formed before insertion in t e filter, but are subjected topressure after insertion in the filter when the bolts a2 are tightened.In operation, the liquor enters through the conduit a1 and passes to allparts of the annular chamber B2, from whence it passes through theadmission. ports 521 of the sevybeen given for clearncss ofunderstanding only, and no undue limitation is to be understoodtherefrom.

vWhat I regard as new, and desire to secure by Letters Patent, is-

1. In a filter, the combination of a plurality of cells, each. cellcon'iprisii'ig a cell pan or support having its bottom provided on bothsides with grooves, and provided centrallywith a perforation, aconduit-section extending through said perforation, a packing-ring atthe lower outer marginal surface of each cell pan bottom, thepacking-ring of one cell pan being received in the upper portion of thecell pan beneath, and each packing-ring being provided withperforations, ports opening througl'i said conduit-sections andcommunicating with the grooves on the upper sides of the cell panbottoms, and filtermasses in said cell pans.

2. In a filter, the combination of a plurality of cells, each cellcomprising a cell pan having a corrugated bottom affording grooves onboth sides of the bottom, the bottom having a central perforation, aconduit-section extending through said perforation and equipped with anexternal iange serving as a packing-ring located above the uppermarginal surface surrounding said perforation, said conduit-sectionhaving perforations and communicating with the grooves on the uppersurface of the cell pan bottom, a packingring surrounding theconduit-section bcneath the cell pan bottom, a packing-ring at the lowerouter marginal surface of the cell pan bottom provided with perforationscommunicating with the grooves on the under surface of' the cell panbottom, the lastnanied packing-ring of each cell pan bottom beingreceived in the upper portion of the cell pan beneath, and a filter-massconfined between the bottom of each cell pan and the lower surface ofthe bottom of the next superposed cell pan.

3. In a filter, the combination of a plurality of cells, each cellcomprising a cell pan havin a corrugated bottom provided with a centraperforation and having a raised fiat outer marginal portion and adepressed flat inner marginal portion, a conduit-section having anexternal flange bearing upon the' upper surface of the inner marginalportion of the cell pan bottom, said conduit-section having perforationscommunicating with the grooves on the upper surface of the cell panbottom, the lower portion of the conduitsection being of a reduceddiameter, a packing-ring on the coi'iduit-section beneath the lowersurface of the inner margin of the cell pan bottom, a packing-ringapplied at the lower surface of the outer marginal portions of the cellpan bottom and provided with perforations, said last-named packing-ringof one cell pan bottom being received within the upper portion of thecell pan beneath, and a filter-mass in the cell pan confined b`etweenthe cell pan bottom and the lower surface of the bottom of the nextsuperposed cell pan.

4. In a filter, the combination of a plurality of filter-cells, eachcell comprising a cell pan or support having a corrugated bottom and acentral perforation, and having a raised flat outer marginal portion anda depressed flat inner marginal portion, a 'conduit-section extendingthrough said central perforation and having an external flange bearingupon the upper surface of the inner marginal portion of the cell panbottom, and perforations extending therethrough and communicating withthe grooves on the upper surface of the cell pan bottom, a packingringencircling the conduit-section and bearing against the lower surface ofthe inner marginal portion of the cell pan bottom, a;

packing-ring bearing upon the upper surface of the outer marginalportion of the cell pan bottom, a packing-ring applied at the lowersurface of the outer marginal portion of the cell pan bottom andprovided with perforations communicating with the grooves on the lowerside of the cell pan, and filter-masses in said cell pan.

5. In a filter, the combination of a plurality of cells, each cellcomprising a cell pan or support having a bottom provided with'deep andnarrow corrugations and provided centrally with a perforation, aconduit-section extending through said central perforation,packing-rings above and beneath the cell pan bottom at saidconduit-section, packingrings above and beneath the cell pan bottom atthe outer marginal portion thereof, and a disk of filtering material inor on each cell pan or support and resting directly upon the corrugatedbottom thereof.

6. In a filter, the combination of a casing having a central outletconduit, an inlet conduit, and a plurality of cells within said casingand forming with the cylindrical wall of the casing an annular chamber,each cell comprising a cell pan having a corrugated bottom and a centralperforation, a conduitsection extending through said central perforationand having an external flange forming a packing-ring at one side of thecell pan bottom, a packing-ring applied to the conduit-section at theopposite side of said cell pan bottom, said conduit-section havingperforations and communicating with the grooves on the under surface ofthe cell pan bottom, a packing-ring' applied to the upper surface of theouter marginal'portion of the cell pan bottom, a packing-ring applied tothe lower surface of the outer marginal portion of the cell pan bottom,said last named packing ring having perforations communicating with thegrooves on the lower side of the cell pan bottom, the last-namedpackingring of one cell pan bottom being received within the upperportion of the cell pan beneath, and a single pad of filtering materialconfined in each cell pan.

7. In a filter-cell, the combination of a cell pan orsupport having acorrugated bottom and provided with a central perforation, the bottom ofsaid cell pan having an elevated flat marginal portion adjacent to thevertical flange of the cell pan and having a depressed flat marginalportion surrounding the central perforation, a packing-ring applied tothe lower surface of the cell pan bottom at the outer flat marginalportion thereof and provided with radial openings, an externally flangedconduit-section extending through said central perforation, the flangebearing upon the upper surface of the inner flat marginal portion of thecell pan bottom, the, conduit-section having radial perforationscommunicating with the grooves on the upper surface of the cell panbottom, and a packing-ring applied to the conduit-section at the lowersurface of the inner flat marginal portion of the cell pan bottom.

8. In a filter-cell, a cell pan having a corrugated bottom and a centralperforation, a packing-ring applied to the lower surface of the outermarginal portion of the cell pan bottom and having openings therethroughcommunicating with the grooves on the lower surface of the cell panbottom, and a conduitsection extending through said central perforationand provided with. perforations communicating with the grooves on theupper surface of the cell pan bottom.

9. In a filter cell, a cell pan or support having a bottom provided withcorrugations and with a central perforation and provided with a flatraised outer marginal portion and a flat depressed inner marginalportion, a packingring applied to the lower surface of said outerflatinarginal portion of the cell pan bottom and provided with openingsextending therethrough, a conduit-section extending through said centralperforation and having an externally flanged bearing upon the -uppersur. face of the inner marginal portion of the cell pan bottom, saidconduit-section having perforations therethrough communicating with thegrooves on the upper surface of the cell pan bottom, and a packing-ringencircling said conduit-section and bearing against the lower surface ofthe inner marginal portion of the cell pan bottom.

JOHN T. H. PAUL.

In presence of* L. HEIsLAR, R. SGHAEFER.

